So siehts ganz gut aus !

node_modules/es5-ext/object/safe-traverse.js

@@ -0,0 +1,16 @@
+"use strict";
+
+var value   = require("./valid-value")
+  , isValue = require("./is-value");
+
+module.exports = function (obj /*, …names*/) {
+	var length, current = 1;
+	value(obj);
+	length = arguments.length - 1;
+	if (!length) return obj;
+	while (current < length) {
+		obj = obj[arguments[current++]];
+		if (!isValue(obj)) return undefined;
+	}
+	return obj[arguments[current]];
+};